el ward



(No Model.) 3 Sheets-Sheet 1.,

J. H. ELWARD.

RIVET I NG MACHINE.

" Patented. Jan; 11, 188,?

mewmew I 16 N N. PETERS. PhnQo-Lithcgnphur, Wnhlnginn. D. C.

3 SheetsSheet 2.

(No'ModeL) J. H. ELWARD.

RI VETING MACHINE.

Patented. Jan. 11, 1887.

(No Model!) 3 SheetSSheet-3.

J. H. ELWARD. RIVE-TING MACHINE; No. 356.033. Patented Jan 11,1887.

N. perms. Pholo-Limognplm, wzuningtun, n. c

, NlTE STATS AND D. M. SABIN,

OF SAME PLACE.

RIVETING MACHINE.

SPECIFICATION forming part of Letters Patent No. 356,033, dated January11, 1887.

Application filed January 11, 1882. Serial No. 49,866. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOHN H. ELWARD, a citizen of the United States ofAmerica, residing at Stillwater, in the county of \Vashington and Stateof Minnesota, have invented certain new and useful Improvements inRiveting-Machines; and I do hereby declare the following to bea full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

Figure 1 is a side elevation, partly in section, of a machine embodyingmy entire invention. Fig. 2 is an end view, partly in section, parts ofthe machine being broken away. Fig. 3 is an end view, partly in section,of a machine containing one part of my invent-ion. Fig. 4 is a side viewof Fig. 3, and Fig. 5 is a side view, partly in section, of amachinecontaining a portion of my invention.

In the drawings, A is an abutment made sufficiently strong and rigid toreceive the end of a rivet and support it against such thrust or impactas it may be found necessary to subject it to.

B C are posts or standards, one or both of them being provided with ascrew-threaded opening to receive and support a screw-shaft, D, theinner end, d, of which engages with a swinging arm or carrier, E,carrying upon its inner face a boss, punch, or projection, e,corresponding in position to a similar boss, to, on the abutment A,these punches being concaved to produce the desired form of rivet.

F is a drum keyed rigidly to screw-shaft D,

and connected by an endless cord or belt, G, I

with a similar drum, H, which is keyed to a shaft, I, mounted to revolvein hearings or hangers h, which in turn are secured to any desired partof the building, or to a portion of a frame-work, to which also theabutment A. and posts B C are attached. Thus when the screwshaft isturned in the proper direction it operates as a pusher to thrust thecarrier E and its attached punch 0 toward the stationary abutment toupset the end of the rivet.

J K are band wheels or cogged wheels mounted loosely upon shaft I, anddriven in opposite directions by'means of any desired motor. Each ofthese wheels carries upon its inner face a friction-cone, (marked,respectively, j 70.)

L isa double friction-clutch mounted on shaft I so as to slide thereon,but keyed or splined to it, and operated by means of a shipping-lever insuch manner that when one end of said clutch is caused to engage withthe friction-cone j the shaft I is caused. to rotate in the samedirection with wheel J, and thus impart a similar rotary motion to drumsH F and screw-shaft D.

It will be readily seen that by means of the devices thus described thescrew-shaft D and swinging arm E can be advanced toward or withdrawnfrom the abutment A at the will of the operator, it being understoodthat the screw-shaft is connected with the free end of arm E in suchmanner as to withdraw it from the abutment when the shaft is rotated inthe opposite direction; or such connection may be dispensed with and thearm thrust from the abutment by means of a spring or otherwise. Ipropose to employ also a secondary or supplementary pusher to completethe riveting operation which has thus been commenced, and I will nowdescribe devices which I have invented for that purpose.

M is a lever fulcrumed at m in the upper end of post B, which is slottedfor that purpose, carrying at its lower end a cam, m, in such positionas to engage with the rear face of arm E.

M is a weight attached to the upper swinging end of lever M, to impart aheavy forward thrust to arm F when the lever is permitted to swing fromthe position shown to a substantially horizontal position. The weight Mmay be increased or diminished, as circumstances shall require,bychanging the number of plates m upon the end of the lever, or byshifting the position of the weight upon said lever.

N is a drum mounted loosely on shaft 11., which rotates in suitablehangers or bearings, and is connected with lever M by a rope, O.

O is a clutch feathered to shaft n, so as to rotate therewith, and slidethereon when actuated by a bell-crank lever, P P, which is pivoted at pto the frame-work, its arm P crossing the path of the lever M, so thatsaid 5 shaft, while T and T of different sizes, are

permits the said drum to remain at rest upon shaft n, which is drivencontinuously in one direction by the bevelgears shown in Fig. 2.

The pawl it engages with ratchet-teeth formed on one flange of the drum,and thus prevents the weight of the lever from turning the drum until atthe proper time the ratchet is tripped by the attendant, thus allowingthe weighted end of the lever to fall. W

A rope, Q, connects one end of lever, M with a drum, Q, mounted looselyupon shaft Q, and connected therewith at intervals by means of a slidingclutch, R, the tapering face or cone of which engages with acorresponding clutch-cone formed on or attached rigidly to drum Q, acontinuous motion being imparted to shaft Q from a motor. (Not shown.)

In Fig. 1 I have illustrated a device which, under some circumstances, Ipropose to use for imparting motion to wheels J K, asfollows: S is ashaft carrying three band-wheels, T, T, and T, T being keyed rigidly tothe mounted loosely upon the shaft S, and alternately connectedtherewith by means of a friction-clutch, which-is composed of a hubsplined to shaft S, and carrying four arms, u u u u, one end of each armbeing pivoted to the hub, its opposite end being pivoted to a segment ofa flange, two of these flanges being arranged to take hold of the innerface of a flange, t, on the vertical face of band-wheel T, the oppositesegmental flanges taking hold of the inner face of a similar flange, iwhich projects from the vertical face of band-wheel T These band-wheelsT T" are connected by belts with the band-wheel J, so that saidband-wheel J can be driven at a higher or lower speed by sliding theclutch on shaft S in such manner as to connect either bandwheel T or Twith said shaft. The belt which connects band-wheels T K is crossed, soas to drive the band-wheel K in a direction the reverse of that in whichband-wheel J is driven. By means of these last-described devices, aswill be readily understood, the speed of rotation of screw-shaft D maybe varied, the object in thus varying the speed being to enable theoperator to apply either an increased pressure to the rivet or to givean accelerated speed to the screw, the speed of rotation of shaft Sbeing constant.

My machine may be operated as follows: The parts to be riveted togethermay be placed between the bosses or punches e a and the screw-shaft Drotated in such direction as to force the boss or punch 6 against therivet, the amount of pressure which is applied to the rivet dependingupon the force which is weight M will depress the swinging end of thelever, and the momentum thus acquired will, through the action of camon, impart an additional pressure to the rivet, and thus, under ordinarycircumstances, complete the upsetting of the same; but if from any causethe momentum acquired by the falling weight should be found insufficientfor this purpose, still further compression or upsetting may be effectedby pulling down upon the end of the lever through the operation of thedrum Q, and

mpe Q. Both of the carrier-moving devices that is, the screw'and the,camact as pushers to force the carrier toward the abutment, and do notdepend upon any sudden impact or blow to effect the complete-upsettingof the rivet; or, under some circumstances, I may dispense with the useof band-wheels F H and force the arm Etoward the abutment by means ofthe lever M and cam on, employing the supplemental rope and drum Q Q, toproduce additional compression, if found necessary.

It will, of course, be understood that the friction-clutches areprovided wit-h suitable shifting-levers, V W, or other mechanismarranged within reach of the operator, so that he can by means of cordso 12 'w 10 and hand-levers or foot-treadles 'v o w w control themovement of the various parts of the mechanism, as may be foundrequisite.

It will be seen that by reason of the friction between the engagingclutch-faces when the drums F H are employed the screw-shaft D is keptconstantly in firm contact with the swinging arm E, so as to take up orfollow up any advance which is produced in that arm by the action of thecam m.

It will be readily understood by an examination of Figs. 1 and 5 thatriveting may be accomplished by the use of screw-shaft D and itsactuating mechanism independently of the lever M and cam m, and thatwhere comparatively little power is required to upset the rivetssatisfactorily the double speeding devices may be so employed as to dothe work quite rapidly; and it will also be seen that by means of thetreadles the power which shall be applied to the screw-shaft may beregulated practically at the will of the operator by increasing ordiminishing the friction of the clutch mechanism. So, also, it will beseen by examination of Figs. 1, 2, 3, and 4 that the lever M, cam m, andtheir actuating mechanism may be employed independently of thescrew-shaft under some conditions; but in practice, particularly forheavy work, I prefer to use the screw-shaft and the lever and camconjointly, as I have described.

In the above description and in the following claims I mentionspecifically the lever M and the screw-shaft as mechanical movementsadapted to the purpose of carrying out my invention; but it will beunderstood that in IIO place thereof may be substituted equivalents,

.so long as they are of such characteras to attain the ends aimed at inusing the screw movement and lever-movement set forth,

What I claim is-= 1. In a riveting-machine, the combination, with astationary support for the rivet and a movable arm or carrier adapted toengage 5 with and upset the rivet, of the screw-shaft to advance thearm, and the lever M and cam m, substantially as set forth.

2. In a riveting-machine, the combination of the stationary abutment A,a swinging arm or carrier, E, arranged oppositely thereto, and to bemoved toward and from the abutment, a screw-threaded device adapted tomove said carrier E toward the abutment A,and bearing against saidcarrier at substantially the same point at all times, devices whichimpart one speed to the threaded part,and devices which impart anotherspeed to said threaded part, substantially as set forth.

3. In a riveting-machine, the combination of the stationary abutment A,the swinging arm or carrier E, arranged oppositely thereto, and to bemoved toward and from the abutment, a screw which moves the carrier E,means for rotating said screw at one speed,

and means for rotating said screw at a different speed, substantially asset forth.

4. In a riveting-machine, the combination, with the screw-shaft D, ofthe lever M, cam on, and means for imparting additional im- 0 pulse tosaid cam after the weight at the end of the lever has acted upon therivet with its full force.

5. In combination with the screw-shaft and its driving rope or belt, thedriving-pulley and a friction clutching mechanism, whereby the forceexerted upon the screw-shaft may be varied at the will of the operator.

6. The combination, with the screw-shaft, the drums F H, and rope G, oftwo driving- 0 wheels adapted to move in opposite directions, and aclutch mechanism adapted to engage each of said wheels alternately withthe driving-sh'aft, which carries band-wheel H, substantially as setforth.

7. The combination, with lever M, of rope 0, wheel N, pawl n, and atripping mechanism, substantially as set forth.

8. The combination, with lever M, rope O, belt-wheel N, and itssupporting-shaft, of the clutch O and means actuated by lever M forthrowing said band-wheel N out of operation, substantially as setfort-h.

9. In a riveting-machine, the combination, with the abutment and themovable punch, of I the cam, the lever, the means for elevatingthe freeend of the lever, and means for drawing said end positively downward,substantially as set forth.

10. In a riveting-machine,the combination, with the abutment and themovable carrier, of the cam, the lever, the mechanism for elevating thefree end of the lever,and a weight, which may be increased ordiminished,secured to the lever, substantially as set forth.

11. In a riveting-machine,the combination, 6 5 with the stationaryabutment, of a swinging carrier, a pusher which bears against theswinging carrier and moves it with a comparatively slow speed tocommence the upset ting of the rivet, and another pusher bearing againstthe carrier and adapted to move it with greater power and speed than thefirst pusher after said first pusher has partially completed theupsetting of the rivet, said pushers being arranged substantially as andfor the purposes set forth.

12. In a riveting-machine,the combination, with a stationary abutmentand a movable arm or carrier adapted to engage with and upset the rivet,of a screwshaft independent of 80 said arm or carrier, and mechanism,substantially as set forth, whereby the speed of the screw-shaft may bevaried at the will of the operator, substantially as described.

13. In a riveting-machine, the combination of the stationary abutment A,the movable carrier E, the screw bearing against the carrier to move ittoward the abutment, the cam adapted to bear against the carrier andmove it after the screw has ceased its motion, and the mechanism forcausingsaid screw to follow, up any advance of the carrier caused by thecam, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN H. ELWARD.

WVitn esses:

J. S. BARKER, H. H. DOUBLEDAY.

